everyday calculator
Gas Guzzling Cost Calculator
Compare weekly, monthly, and annual fuel costs for a low-MPG car versus a more efficient option.
Results
- Weekly miles
- 150.00
- Weekly gallons (current car)
- 8.33
- Weekly fuel cost (current car)
- $31
- Weekly fuel cost (efficient car)
- $19
- Weekly savings vs efficient car
- $13
- Monthly fuel cost (current car)
- $135
- Annual fuel cost (current car)
- $1,625
- Annual savings vs efficient car
- $650
- Weekly gallons saved vs efficient
- 3.33
How to use this calculator
- Enter how many miles you drive per day and how many days per week.
- Enter your current vehicle MPG, a more efficient MPG to compare, and gas price.
- Review weekly, monthly, and annual fuel costs plus the savings if you upgrade.
Inputs explained
- Driving days
- Use 5 for a standard workweek or lower if you have remote days.
- MPG values
- Use real-world MPG from your dash or app, not EPA stickers.
- Gas price
- Average price you typically pay per gallon.
How it works
Weekly miles = daily miles × driving days.
Gallons = weekly miles ÷ MPG; cost = gallons × gas price.
Savings are the difference between your current car and the more efficient option.
When to use it
- Estimating how much a low-MPG vehicle costs to fuel for your commute.
- Comparing your current car to a hybrid/efficient car before buying.
- Highlighting savings from carpooling or reducing drive days.
Tips & cautions
- If your driving varies, run a few scenarios with different days per week.
- Gas prices swing—test higher prices to stress-test your budget.
- Include city vs highway MPG differences by picking realistic numbers for your mix.
- Assumes constant MPG and gas price; real-world conditions change.
- Does not cover maintenance, depreciation, or EV charging costs.
Deep dive
See how much a gas-guzzling car costs to fuel each week, month, and year—plus savings if you switch to a higher-MPG vehicle.
Enter daily miles, drive days, MPG, and gas price to compare fuel costs and budget for an upgrade.
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